CN210378009U

CN210378009U - Mathematics geometry drawing teaching aid

Info

Publication number: CN210378009U
Application number: CN201921265298.3U
Authority: CN
Inventors: 王立威
Original assignee: Liupanshui Normal University
Current assignee: Liupanshui Normal University
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-04-21
Anticipated expiration: 2029-07-30

Abstract

The utility model relates to a mathematical geometry drawing teaching aid, belonging to the technical field of teaching aids; the lower side wall of the left end of the first ruler is fixed with a vertical ruler, the lower end of the vertical ruler is suspended at the lower side of the second ruler after passing through the second ruler, the left and right ends of the front side wall of the first ruler are respectively screwed with a first connecting rod through screws, the lower end of the first connecting rod is respectively screwed with a second connecting rod through connecting bolts, the lower end of the second connecting rod is respectively inclined towards two sides and then is screwed with the left and right ends of the front side wall of the second ruler, the left end of the second ruler is integrally formed with a bulge which is inserted at the right side of the right side wall of the protractor in a sliding way, the upper end of the right side wall of the protractor is fixed at the left end of the first ruler, the first ruler and the second ruler are arranged in parallel, the second ruler is sleeved on the vertical ruler, the position of the second ruler can be adjusted according to the distance needed by the two parallel lines, drawing is carried out after the fixing, thereby the parallelism of the two lines can be determined, low manufacturing cost and the like.

Description

Mathematics geometry drawing teaching aid

Technical Field

The utility model relates to a teaching aid technical field, concretely relates to mathematical geometry mapping teaching aid.

Background

Geometry is a subject for studying spatial structure and properties, is one of the most basic research contents in mathematics, has the same important status as analysis, algebra and the like, and has very close relationship, and a lot of figures are needed for assistance in geometry teaching, so that the teaching intensity is enhanced, and a better teaching effect is achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a reasonable in design, convenient to use's mathematics geometric construction teaching aid, a chi and No. two chi parallel arrangement, No. two chi covers are established on erecting the chi, can adjust the position of No. two chi according to the distance that two parallel lines need, and the drawing is done after fixing to can confirm the depth of parallelism of two lines, and convenient operation.

In order to achieve the above object, the utility model adopts the following technical scheme: it comprises a first ruler, a second ruler, a vertical ruler, a first connecting rod, a second connecting rod, a connecting bolt and a protractor, a vertical ruler is fixed on the lower side wall of the left end of the first ruler, the lower end of the vertical ruler is suspended at the lower side of the second ruler after passing through the second ruler, the second ruler is arranged in parallel with the first ruler, the right end of the second ruler and the right end of the first ruler are arranged in the same vertical plane, the left end and the right end of the front side wall of the first ruler are respectively screwed with a connecting rod through screws, the lower ends of the first connecting rods are respectively screwed with a second connecting rod through connecting bolts after inclining towards the center, the lower ends of the second connecting rods incline towards two sides respectively, is screwed on the left end and the right end of the front side wall of the second ruler through screws, the left end of the second ruler is integrally formed with a bulge, the bulge is inserted on the right side of the right side wall of the protractor in a sliding manner, and the upper end of the right side wall of the protractor is fixed on the left end of the first ruler.

Furthermore, a screw rod is suspended on the front side of the connecting bolt, a sleeve is fixedly sleeved at the middle end of the screw rod, the screw rod is oppositely arranged towards threads on two sides by taking the sleeve as a center, and nuts at two ends of the screw rod are respectively and fixedly connected with the connecting bolts on two sides.

Further, the bracing piece has connect soon through the connecting piece on the lower lateral wall of No. two chi right-hand members, and after the left end downward sloping of this bracing piece, connect soon through the connecting piece with the right side wall of erecting the chi lower extreme, the bracing piece comprises a branch and No. two branches, and the both ends of a branch are overlapped respectively and are equipped with No. two branches, and pass through the bolt fastening, and the one end that No. two branches kept away from a branch connects soon through the connecting piece and the lower lateral wall of No. two chi right-hand members and the right side wall of erecting the chi lower extreme respectively.

Furthermore, a straight rod is inserted into the vertical ruler and fixed through a bolt, the lower end of the straight rod penetrates through the lower end of the vertical ruler and then is fixedly connected with the upper surface of a limiting plate, and the limiting plate is arranged in parallel with the second ruler.

Furthermore, the lower surface of the limiting plate is provided with an anti-skid pad.

After the structure is adopted, the beneficial effects of the utility model are that: a mathematics geometry mapping teaching aid, a chi and No. two chi parallel arrangement, No. two chi covers are established on erecting the chi, can adjust the position of No. two chi according to the distance that two parallel lines needed, fix and draw after good to can confirm the depth of parallelism of two lines, and convenient operation, the utility model has the advantages of it is reasonable to set up, the cost of manufacture is low.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a side view of the present invention.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Description of reference numerals:

the ruler comprises a first ruler 1, a second ruler 2, a vertical ruler 3, a first connecting rod 4, a second connecting rod 5, a connecting bolt 6, a protractor 7, a protrusion 8, a screw rod 9, a sleeve 10, a supporting rod 11, a first supporting rod 11-1, a second supporting rod 11-2, a straight rod 12, a limiting plate 13 and an anti-slip pad 14.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the following technical solutions are adopted in the present embodiment: the device comprises a first ruler 1, a second ruler 2, a vertical ruler 3, a first connecting rod 4, a second connecting rod 5, a connecting bolt 6 and a protractor 7, wherein the vertical ruler 3 is fixedly welded on the lower side wall of the left end of the first ruler 1, a straight rod 12 is inserted into the vertical ruler 3 and is fixed through the bolt, the lower end of the straight rod 12 penetrates through the lower end of the vertical ruler 3 and is fixedly welded with the upper surface of a limiting plate 13, the limiting plate 13 and the second ruler 2 are arranged in parallel and can support the vertical ruler 3, the limiting plate 13 is contacted with the lower frame of a blackboard, so that the parallelism of the device can be ensured, an anti-skid pad 14 is fixedly adhered on the lower surface of the limiting plate 13 and can prevent the limiting plate 13 from skidding, the lower end of the vertical ruler 3 penetrates through the second ruler 2 and is arranged on the lower side of the second ruler 2 in a suspending manner, the second ruler 2 and the first ruler 1 are arranged in parallel, and the right end of the second ruler 2 and the right end of the first, the left end and the right end of the front side wall of the first ruler 1 are respectively and rotatably connected with a first connecting rod 4 through screws, the lower end of the first connecting rod 4 is respectively and rotatably connected with a second connecting rod 5 through a connecting bolt 6 after inclining towards the center, the front side of the connecting bolt 6 is suspended with a screw rod 9, the middle end of the screw rod 9 is sleeved with a sleeve 10 which is fixedly welded, the screw rod 9 is arranged towards the opposite threads of the two sides by taking the sleeve 10 as the center, nuts at the two ends of the screw rod 9 are respectively and fixedly welded with the connecting bolts 6 at the two sides, the screw rod 9 can respectively drive the first connecting rod 4 and the second connecting rod 5 to move in the rotating process, thereby conveniently driving the second ruler 2 to move, the lower end of the second connecting rod 5 is respectively and rotatably connected on the left end and the right end of the front side wall of the second ruler 2 through screws after inclining towards the two sides, a bulge 8 is integrally formed at the left end of the, the upper end of the right side wall of the protractor 7 is welded and fixed on the left end of the first ruler 1, the lower side wall of the right end of the second ruler 2 is screwed with the support rod 11 through the connecting piece, the connecting piece is welded and fixed on the lower side wall of the right end of the second ruler 2, the connecting piece is screwed with the support rod 11 through the bolt, after the left end of the support rod 11 inclines downwards, the support rod 11 is screwed with the right side wall of the lower end of the vertical ruler 3 through the connecting piece, the connecting piece is welded and fixed on the right side wall of the lower end of the vertical ruler 3, the connecting piece is screwed with the left end of the support rod 11 through the bolt, the support rod 11 is composed of a first support rod 11-1 and a second support rod 11-2, two ends of the first support rod 11-1 are respectively sleeved with the second support rod 11-2 and fixed through the bolt, one end of the second support rod 11-2 far away from the first support, the right end of the second ruler 2 can be supported.

The working principle of the specific embodiment is as follows: when two parallel lines need to be drawn, a limiting plate 13 is placed on the lower frame of the blackboard according to the required height, then a bolt between a straight rod 12 and a vertical ruler 3 is loosened, the vertical ruler 3 moves upwards until the required position is reached, the bolt is screwed down, then a sleeve 10 is rotated according to the required distance between the two parallel lines, the sleeve 10 drives a screw rod 9 to rotate, because the threads at the two ends of the screw rod 9 are arranged oppositely, the screw rod 9 drives two connecting bolts 6 to move towards two sides through nuts at the two ends of the screw rod 9 when rotating until the second ruler 2 reaches the required position, at the moment, the sleeve 10 is held by one hand, the two parallel lines are drawn on the blackboard by using chalk by the other hand, when straight lines with two crossed ends need to be drawn, the first ruler 1 and the second ruler 2 are vertically placed, the right end of the first ruler is placed on the lower frame of the blackboard, at the moment, the protractor 7 is parallel to the lower surface, two straight lines of the desired angle are drawn by the protractor 7.

After adopting above-mentioned structure, this embodiment's beneficial effect is as follows:

1. the first ruler 1 and the second ruler 2 are arranged in parallel, the second ruler 2 is sleeved on the vertical ruler 3, the position of the second ruler 2 can be adjusted according to the distance required by the two parallel lines, and drawing is performed after the second ruler is fixed, so that the parallelism of the two lines can be determined, and the operation is convenient;

2. the connecting bolt 6 between the first connecting rod 4 and the second connecting rod 5 is fixedly connected with the nuts at two ends of the screw rod 9, threads at two ends of the screw rod 9 are arranged oppositely, and the screw rod 9 can respectively drive the first connecting rod 4 and the second connecting rod 5 to move in the rotating process, so that the second ruler 2 can be conveniently driven to move;

3. the straight rod 12 is inserted into the vertical ruler 3, the vertical ruler 3 can be supported, and the limiting plate 13 at the lower end of the straight rod 12 is in contact with the lower frame of the blackboard, so that the parallelism of the device can be ensured.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A mathematical geometry drawing teaching aid is characterized in that: the novel ruler comprises a first ruler (1), a second ruler (2), a vertical ruler (3), a first connecting rod (4), a second connecting rod (5), a connecting bolt (6) and a protractor (7), wherein the vertical ruler (3) is fixed on the lower side wall of the left end of the first ruler (1), the lower end of the vertical ruler (3) passes through the second ruler (2) and is suspended at the lower side of the second ruler (2), the second ruler (2) and the first ruler (1) are arranged in parallel, the right end of the second ruler (2) and the right end of the first ruler (1) are arranged in the same vertical plane, the first connecting rod (4) is screwed on the left end and the right end of the front side wall of the first ruler (1) through screws respectively, the second connecting rod (5) is screwed on the connecting bolt (6) after the lower end of the first connecting rod (4) inclines towards the center, the lower end of the second connecting rod (5) inclines towards two sides respectively, and is screwed on the left end and the right end of the front side wall of the second ruler (2) through screws, a bulge (8) is integrally formed at the left end of the second ruler (2), the bulge (8) is slidably inserted into the right side of the right side wall of the protractor (7), and the upper end of the right side wall of the protractor (7) is fixed at the left end of the first ruler (1).

2. A mathematical geometry construction teaching aid as claimed in claim 1, wherein: the front side of the connecting bolt (6) is provided with a lead screw (9) in a suspending manner, the middle end of the lead screw (9) is sleeved with a sleeve (10), the lead screw (9) is arranged oppositely to threads on two sides by taking the sleeve (10) as a center, and nuts at two ends of the lead screw (9) are respectively fixedly connected with the connecting bolt (6) on two sides.

3. A mathematical geometry construction teaching aid as claimed in claim 1, wherein: the lower side wall of the right end of the second ruler (2) is connected with a support rod (11) in a rotating mode through a connecting piece, the left end of the support rod (11) is inclined downwards and then connected with the right side wall of the lower end of the vertical ruler (3) in a rotating mode through the connecting piece, the support rod (11) is composed of a first support rod (11-1) and a second support rod (11-2), two ends of the first support rod (11-1) are respectively sleeved with the second support rod (11-2) in a sleeved mode and fixed through bolts, and one end, far away from the first support rod (11-1), of the second support rod (11-2) is connected with the lower side wall of the right end of the second ruler (2) and the right side wall of the lower end of the vertical.

4. A mathematical geometry construction teaching aid as claimed in claim 1, wherein: vertical ruler (3) inside is inserted and is equipped with straight-bar (12), and passes through the bolt fastening, and the lower extreme of this straight-bar (12) passes behind the lower extreme of vertical ruler (3), with the upper surface fixed connection of limiting plate (13), this limiting plate (13) and No. two chi (2) parallel arrangement.

5. A mathematical geometry construction teaching aid as claimed in claim 4, wherein: and the lower surface of the limiting plate (13) is provided with an anti-skid pad (14).